Data Sheet

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ETHERIO24TCPDATASHEET
BASICOVERVIEWOFSERIALCOMMUNICATIONSTOSPIACCESSORYBOARDS
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Listedbelowisabasicoverviewoftheprocedurethatneedstobe
followedinordertocommunicatewiththeboard.
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1. ConfigurethePortforSPIModeusingtheWeb‐basedJava
Application.
2. SetupPortValuesonEtherIO24TCPforidlestateonSPIBoard
3. LowertheCSpinforchipcommunication
4. StartSPIcommunicationbysendingstartbyte
5. SendControlByteorwritecommandregisters
6. SendNullBytesifresponseisrequired.Thisisdonetokeepthe
SPIclockgoingornoresponseswillbeclockedin
7. RaisetheCSpinbacktoidlestate.
8. RepeatfromStep3forothercommands.
Thecodingexamplesbelowgointomoredetailofwhatcommandsareissued
totheboard.InthiscasethecommandsoutlinedarefortheAnalogboard.
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SETTINGUPTHEPORTONTHEETHERIO24TCPFORSPICOMMUNICATIONSTOTHE
ANALOGBOARD
CommunicationtotheAnalogboardisviaSPIfromtheportofEtherIO24
TCP.Howevertheportdirectionandpinswillneedtobesetupbefore
communicationcanbeginwiththeboard.Belowaretheconfigurationsthat
needtobesetupontheEtherIO24TCPfortheanalogboard.
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I/024
COMMAND
DESCRIPTION
A0x79 SetCSforA/DandD/Atoidlestate
A0x71 LowerCSforA/DandD/Atoidlestate
A0x78 LowerCSforD/AandA/Dtoidlestate
A0x38 LowerCSforD/AandsetLDACtohigh
A0x68 LowerLDAC
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©
2013ElexolPtyLtd Revision1.3
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